services: add GladiaSTTService support

CHANGELOG.md

@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added `GladiaSTTService`.
+  See https://docs.gladia.io/chapters/speech-to-text-api/pages/live-speech-recognition
+
+- Added `XTTSService`. This is a local Text-To-Speech service.
+  See https://github.com/coqui-ai/TTS
+
 - Added `UserIdleProcessor`. This processor can be used to wait for any
   interaction with the user. If the user doesn't say anything within a given
   timeout a provided callback is called.
@@ -20,9 +26,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added new frame `BotSpeakingFrame`. This frame will be continuously pushed
   upstream while the bot is talking.
 
-- Added `XTTSService`. This is a local Text-To-Speech service.
-  See https://github.com/coqui-ai/TTS
-
 - It is now possible to specify a Silero VAD version when using `SileroVADAnalyzer`
   or `SileroVAD`.
 

README.md

@@ -39,7 +39,7 @@ pip install "pipecat-ai[option,...]"
 
 Your project may or may not need these, so they're made available as optional requirements. Here is a list:
 
-- **AI services**: `anthropic`, `azure`, `deepgram`, `google`, `fal`, `moondream`, `openai`, `openpipe`, `playht`, `silero`, `whisper`, `xtts`
+- **AI services**: `anthropic`, `azure`, `deepgram`, `gladia`, `google`, `fal`, `moondream`, `openai`, `openpipe`, `playht`, `silero`, `whisper`, `xtts`
 - **Transports**: `local`, `websocket`, `daily`
 
 ## Code examples

dot-env.template

@@ -27,6 +27,9 @@ FAL_KEY=...
 # Fireworks
 FIREWORKS_API_KEY=...
 
+# Gladia
+GLADIA_API_KEY=...
+
 # PlayHT
 PLAY_HT_USER_ID=...
 PLAY_HT_API_KEY=...

examples/foundational/07j-interruptible-gladia.py

@@ -0,0 +1,101 @@
+#
+# Copyright (c) 2024, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+import asyncio
+import aiohttp
+import os
+import sys
+
+from pipecat.frames.frames import LLMMessagesFrame
+from pipecat.pipeline.pipeline import Pipeline
+from pipecat.pipeline.runner import PipelineRunner
+from pipecat.pipeline.task import PipelineParams, PipelineTask
+from pipecat.processors.aggregators.llm_response import (
+    LLMAssistantResponseAggregator, LLMUserResponseAggregator)
+from pipecat.services.deepgram import DeepgramSTTService, DeepgramTTSService
+from pipecat.services.gladia import GladiaSTTService
+from pipecat.services.openai import OpenAILLMService
+from pipecat.services.xtts import XTTSService
+from pipecat.transports.services.daily import DailyParams, DailyTransport
+from pipecat.vad.silero import SileroVADAnalyzer
+
+from runner import configure
+
+from loguru import logger
+
+from dotenv import load_dotenv
+load_dotenv(override=True)
+
+logger.remove(0)
+logger.add(sys.stderr, level="DEBUG")
+
+
+async def main(room_url: str, token):
+    async with aiohttp.ClientSession() as session:
+        transport = DailyTransport(
+            room_url,
+            token,
+            "Respond bot",
+            DailyParams(
+                audio_out_enabled=True,
+                vad_enabled=True,
+                vad_analyzer=SileroVADAnalyzer(),
+                vad_audio_passthrough=True,
+            )
+        )
+
+        stt = GladiaSTTService(
+            api_key=os.getenv("GLADIA_API_KEY"),
+        )
+
+        tts = DeepgramTTSService(
+            aiohttp_session=session,
+            api_key=os.getenv("DEEPGRAM_API_KEY"),
+            voice="aura-helios-en"
+        )
+
+        llm = OpenAILLMService(
+            api_key=os.getenv("OPENAI_API_KEY"),
+            model="gpt-4o")
+
+        messages = [
+            {
+                "role": "system",
+                "content": "You are a helpful LLM in a WebRTC call. Your goal is to demonstrate your capabilities in a succinct way. Your output will be converted to audio so don't include special characters in your answers. Respond to what the user said in a creative and helpful way.",
+            },
+        ]
+
+        tma_in = LLMUserResponseAggregator(messages)
+        tma_out = LLMAssistantResponseAggregator(messages)
+
+        pipeline = Pipeline([
+            transport.input(),   # Transport user input
+            stt,                 # STT
+            tma_in,              # User responses
+            llm,                 # LLM
+            tts,                 # TTS
+            transport.output(),  # Transport bot output
+            tma_out              # Assistant spoken responses
+        ])
+
+        task = PipelineTask(pipeline, PipelineParams(allow_interruptions=True))
+
+        @transport.event_handler("on_first_participant_joined")
+        async def on_first_participant_joined(transport, participant):
+            transport.capture_participant_transcription(participant["id"])
+            # Kick off the conversation.
+            messages.append(
+                {"role": "system", "content": "Please introduce yourself to the user."})
+            await task.queue_frames([LLMMessagesFrame(messages)])
+
+        runner = PipelineRunner()
+
+        await runner.run(task)
+
+
+if __name__ == "__main__":
+    (url, token) = configure()
+    asyncio.run(main(url, token))

pyproject.toml

@@ -41,6 +41,7 @@ daily = [ "daily-python~=0.10.1" ]
 deepgram = [ "deepgram-sdk~=3.2.7" ]
 examples = [ "python-dotenv~=1.0.0", "flask~=3.0.3", "flask_cors~=4.0.1" ]
 fal = [ "fal-client~=0.4.0" ]
+gladia = [ "websockets~=12.0" ]
 google = [ "google-generativeai~=0.5.3" ]
 fireworks = [ "openai~=1.26.0" ]
 langchain = [ "langchain~=0.2.1", "langchain-community~=0.2.1", "langchain-openai~=0.1.8" ]

src/pipecat/services/gladia.py

@@ -0,0 +1,115 @@
+#
+# Copyright (c) 2024, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+import base64
+import json
+import time
+
+from typing import Optional
+from pydantic.main import BaseModel
+
+from pipecat.frames.frames import (
+    AudioRawFrame,
+    CancelFrame,
+    EndFrame,
+    Frame,
+    InterimTranscriptionFrame,
+    StartFrame,
+    SystemFrame,
+    TranscriptionFrame)
+from pipecat.processors.frame_processor import FrameDirection
+from pipecat.services.ai_services import AsyncAIService
+
+from loguru import logger
+
+# See .env.example for Gladia configuration needed
+try:
+    import websockets
+except ModuleNotFoundError as e:
+    logger.error(f"Exception: {e}")
+    logger.error(
+        "In order to use Gladia, you need to `pip install pipecat-ai[gladia]`. Also, set `GLADIA_API_KEY` environment variable.")
+    raise Exception(f"Missing module: {e}")
+
+
+class GladiaSTTService(AsyncAIService):
+    class InputParams(BaseModel):
+        sample_rate: Optional[int] = 16000
+        language: Optional[str] = "english"
+        transcription_hint: Optional[str] = None
+        endpointing: Optional[int] = 200
+        prosody: Optional[bool] = None
+
+    def __init__(self,
+                 *,
+                 api_key: str,
+                 url: str = "wss://api.gladia.io/audio/text/audio-transcription",
+                 confidence: float = 0.5,
+                 params: InputParams = InputParams(),
+                 **kwargs):
+        super().__init__(**kwargs)
+
+        self._api_key = api_key
+        self._url = url
+        self._params = params
+        self._confidence = confidence
+
+    async def process_frame(self, frame: Frame, direction: FrameDirection):
+        await super().process_frame(frame, direction)
+
+        if isinstance(frame, SystemFrame):
+            await self.push_frame(frame, direction)
+        elif isinstance(frame, AudioRawFrame):
+            await self._send_audio(frame)
+        else:
+            await self.queue_frame(frame, direction)
+
+    async def start(self, frame: StartFrame):
+        self._websocket = await websockets.connect(self._url)
+        self._receive_task = self.get_event_loop().create_task(self._receive_task_handler())
+        await self._setup_gladia()
+
+    async def stop(self, frame: EndFrame):
+        await self._websocket.close()
+
+    async def cancel(self, frame: CancelFrame):
+        await self._websocket.close()
+
+    async def _setup_gladia(self):
+        configuration = {
+            "x_gladia_key": self._api_key,
+            "encoding": "WAV/PCM",
+            "model_type": "fast",
+            "language_behaviour": "manual",
+            **self._params.model_dump(exclude_none=True)
+        }
+
+        await self._websocket.send(json.dumps(configuration))
+
+    async def _send_audio(self, frame: AudioRawFrame):
+        message = {
+            'frames': base64.b64encode(frame.audio).decode("utf-8")
+        }
+        await self._websocket.send(json.dumps(message))
+
+    async def _receive_task_handler(self):
+        async for message in self._websocket:
+            utterance = json.loads(message)
+            if not utterance:
+                continue
+
+            if "error" in utterance:
+                message = utterance["message"]
+                logger.error(f"Gladia error: {message}")
+            elif "confidence" in utterance:
+                type = utterance["type"]
+                confidence = utterance["confidence"]
+                transcript = utterance["transcription"]
+                if confidence >= self._confidence:
+                    if type == "final":
+                        await self.queue_frame(TranscriptionFrame(transcript, "", int(time.time_ns() / 1000000)))
+                    else:
+                        await self.queue_frame(InterimTranscriptionFrame(transcript, "", int(time.time_ns() / 1000000)))